Varistor Metal Oxide Varistor Products Page 55 Varistor Metal-Oxide Varistor Products

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 Metal-Oxide Varistors (MOVs) Surface Mount Multilayer Varistors (MLVs) > AUML Series Device Ratings and Specifications Part Number Maximum Ratings (125 C ) Specifications (25 C ) Maximum Continuous DC Voltage Jump Start Voltage (5 Min) Load Dump Energy (10 Pulses) Nominal Varistor Voltage at 10mA DC Test Current Maximum Standby Leakage (at 13V DC) Maximum Clamping Voltage (V C ) at Test Current (8/20 s) V M(DC) V JUMP W LD V N(DC) Min V N(DC) Max I L V C I P (V) (J) (V) ( A) (V) (A) V18AUMLA1206 18 24.5 1.5 23 32 50 40 1.5 V18AUMLA1210 18 24.5 3.0 23 32 50 40 1.5 V18AUMLA1812 18 24.5 6.0 23 32 100 40 5.0 V18AUMLA2220 18 24.5 25 23 32 200 40 10.0 V24AUMLA2220 24 24.5 25 32 39 200 60 10.0 V48AUMLA2220 48 24.5 25 54.5 66.5 200 105 10.0 V68AUMLA2220 68 24.5 25 77.2 94.4 200 135 10.0 NOTES: 1. Average power dissipation of transients not to exceed 0.1W, 0.15W, 0.3W and 1W for model sizes 1206, 1210, 1812 and 2220 respectively. 2. Load dump :min. time of energy input 40ms, interval 60sec(the load dump time constant Td differs from the time constant of energy input; load dump rating for ISO 7637-2 pulse 5a, please contact littelfuse. 3. Thermal shock capability per Mil-Std-750, Method 1051: -55C to 125C, 5 minutes at 25C, 25 Cycles: 15 minutes at each extreme. 4. For application specific requirements, please contact Littelfuse. Current, Energy and Power Derating Curve When transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Characteristics Table for the specific device. Certain parameter ratings must be derated at high temperatures as shown below. 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 PERCENT OF RATED VALUE AMBIENT TEMPERATURE ( o C) T 1 T 2 100 50 0 O 1 TIME PERCENT OF PEAK VALUE T Peak Pulse Current Test Waveform for Clamping Voltage Typical V-I Characteristics of the V18AUMLA2220 at -40C, 25C, 85C and 125C Maximum Leakage Current/Clamping Voltage Curve for AUML Series at 25C VOLTAGE 100 1 1mA 10mA 100mA 1A 10A 100A CURRENT 100A 10A 10 1210/1206 1812 2220 MAXIMUM LEAKAGE MAXIMUM CLAMPING VOLTAGE 1210/1206 1812 2220 100 10 1 1A 10A 100A 1mA -40 o C 25 o C 85 o C 10mA 100mA 1A 10A 100A 1000A CURRENT 125 o C VOLTAGE 0 1 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T 1 = Rise Time = 1.25 x T T 2 = Decay Time Example - For an 8/20 s Current Waveform: 8 s = T 1 = Rise Time 20 s = T 2 = Decay Time Figure 1 Figure 2 Figure 3 Figure 4

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